Update changelog after v1.7.3 release (#14398)

Author: rohitgr7

src/pytorch_lightning/CHANGELOG.md

@@ -103,17 +103,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ### Fixed
 
-- Fixed an assertion error when using a `ReduceOnPlateau` scheduler with the Horovod strategy ([#14215](https://github.com/Lightning-AI/lightning/pull/14215))
-
-
-- Fixed an `AttributeError` when accessing `LightningModule.logger` and the Trainer has multiple loggers ([#14234](https://github.com/Lightning-AI/lightning/pull/14234))
-
-
-- Added back support for `log`ging in the `configure_gradient_clipping` hook after unintended removal in v1.7.2 ([#14298](https://github.com/Lightning-AI/lightning/issues/14298))
-
+- Fixed `LightningDataModule` hparams parsing ([#12806](https://github.com/PyTorchLightning/pytorch-lightning/pull/12806))
 
-- Fixed wrong num padding for `RichProgressBar` ([#14296](https://github.com/Lightning-AI/lightning/pull/14296))
 
+- Reset epoch progress with batch size scaler ([#13846](https://github.com/Lightning-AI/lightning/pull/13846))
 
 - Fixed incorrect values after transferring data to a MPS device ([#13285](https://github.com/Lightning-AI/lightning/issues/13285))
 
@@ -130,6 +123,17 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Fixed `LightningDataModule` hparams parsing ([#12806](https://github.com/PyTorchLightning/pytorch-lightning/pull/12806))
 
 
+## [1.7.3] - 2022-08-25
+
+### Fixed
+
+- Fixed an assertion error when using a `ReduceOnPlateau` scheduler with the Horovod strategy ([#14215](https://github.com/Lightning-AI/lightning/pull/14215))
+- Fixed an `AttributeError` when accessing `LightningModule.logger` and the Trainer has multiple loggers ([#14234](https://github.com/Lightning-AI/lightning/pull/14234))
+- Added back support for `log`ging in the `configure_gradient_clipping` hook after unintended removal in v1.7.2 ([#14298](https://github.com/Lightning-AI/lightning/issues/14298))
+- Fixed wrong num padding for `RichProgressBar` ([#14296](https://github.com/Lightning-AI/lightning/pull/14296))
+- Fixed an issue to avoid the impact of sanity check on `reload_dataloaders_every_n_epochs` for validation ([#13964](https://github.com/Lightning-AI/lightning/pull/13964))
+
+
 ## [1.7.2] - 2022-08-17
 
 ### Added